Kim Daegun, Kim Myeong-Eun, Kim Hoimin, Lee Jaehoon, Lee Jiyun, Lee Hansol, Lee Dongki, Lee Nae-Eung, Kang Boseok
Department of Chemical and Biological Engineering, Gachon University, Seongnam, 13120, Republic of Korea.
SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Science and Technology, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
Small. 2025 Feb;21(5):e2406662. doi: 10.1002/smll.202406662. Epub 2024 Oct 2.
In this study, a wearable and highly stretchable organic thermoelectric (TE) generator with a notable power density is developed. A highly stretchable and solution-processable TE/electrode pattern is realized by stepwise-curing elastomeric and conducting network. Significant advances in the TE or electrical properties are obtained for these stretchable patterns through post-activation treatment, which creates long-range charge transport pathways without degrading pre-established elastomeric networks. The TE and electrode patterns are solution-processed to a stretchable template, so that all-stretchable TE generator is realized. The fabricated TE generator maintains 90% of its maximum TE power output at 40% stretching stress and shows a stable TE power output after 200 stretching cycles. The TE generator maintains its stretchability in highly densified patterns, as the highly stretchable TE/electrode patterns enable good stretchability with little aid of the stretchable template. So, the TE generator has a high power density of 0.32 nW cm K, one of the highest values among stretchable TE generators to date.
在本研究中，开发了一种具有显著功率密度的可穿戴且高度可拉伸的有机热电（TE）发电机。通过逐步固化弹性体和导电网络，实现了一种高度可拉伸且可溶液加工的TE/电极图案。通过后活化处理，这些可拉伸图案在TE或电学性能方面取得了显著进展，该处理创建了长程电荷传输路径，而不会降解预先建立的弹性体网络。将TE和电极图案通过溶液加工到一个可拉伸模板上，从而实现了全可拉伸TE发电机。所制造的TE发电机在40%拉伸应力下保持其最大TE功率输出的90%，并且在200次拉伸循环后显示出稳定的TE功率输出。由于高度可拉伸的TE/电极图案在几乎没有可拉伸模板辅助的情况下就能实现良好的拉伸性，因此TE发电机在高度致密的图案中仍能保持其拉伸性。所以，该TE发电机具有0.32 nW cm K的高功率密度，是迄今为止可拉伸TE发电机中最高的值之一。
